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          <h1 class="post-title" itemprop="name headline">域名解析的那些事</h1>
        

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        <p>域名是指向一个IP，这也许是每个人都知道，估计也是很多人唯一知道的。但其实域名的用法还有其他很多用户，如MX记录、CNAME等，这些都是非常重要的功能，因此大家有必要掌握各种域名解析方法。一条域名解析包含<code>记录类型</code>、<code>主机记录</code>、<code>记录值</code>、<code>TTL</code>等</p>
<h3 id="记录类型"><a href="#记录类型" class="headerlink" title="记录类型"></a>记录类型</h3><ul>
<li>A记录：将域名指向一个IPv4地址（例如：10.10.10.10），需要增加A记录</li>
<li>CNAME记录：如果将域名指向一个域名，实现与被指向域名相同的访问效果，需要增加CNAME记录</li>
<li>MX记录：建立电子邮箱服务，将指向邮件服务器地址，需要设置MX记录</li>
<li>NS记录：域名解析服务器记录，如果要将子域名指定某个域名服务器来解析，需要设置NS记录</li>
<li>TXT记录：可任意填写（可为空），通常用做SPF记录（反垃圾邮件）使用</li>
<li>AAAA记录：将主机名（或域名）指向一个IPv6地址（例如：ff03:0:0:0:0:0:0:c1），需要添加AAAA记录</li>
<li>SRV记录：记录了哪台计算机提供了哪个服务。格式为：服务的名字.协议的类型（例如：_example-server._tcp）</li>
<li>显性URL：将域名指向一个http（s)协议地址，访问域名时，自动跳转至目标地址（例如：将<a href="http://www.net.cn显性转发到www.hichina.com后，访问www.net.cn时，地址栏显示的地址为：www.hichina.com）。" target="_blank" rel="noopener">www.net.cn显性转发到www.hichina.com后，访问www.net.cn时，地址栏显示的地址为：www.hichina.com）。</a></li>
<li>隐性URL：与显性URL类似，但隐性转发会隐藏真实的目标地址（例如：将<a href="http://www.net.cn隐性转发到www.hichina.com后，访问www.net.cn时，地址栏显示的地址仍然为：www.net.cn）。" target="_blank" rel="noopener">www.net.cn隐性转发到www.hichina.com后，访问www.net.cn时，地址栏显示的地址仍然为：www.net.cn）。</a></li>
</ul>
<h3 id="主机记录"><a href="#主机记录" class="headerlink" title="主机记录"></a>主机记录</h3><ul>
<li>www ：将域名解析为<a href="http://www.example.com，填写www；" target="_blank" rel="noopener">www.example.com，填写www；</a></li>
<li>@ ：将域名解析为example.com（不带www），填写@或者不填写；</li>
<li>mail ：将域名解析为mail.example.com，通常用于解析邮箱服务器；</li>
<li>* ：泛解析，所有子域名均被解析到统一地址（除单独设置的子域名解析）；</li>
<li>二级域名 ：如：mail.example.com或abc.example.com，填写mail或abc；</li>
<li>手机网站 ：如：m.example.com，填写m。</li>
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